A profane form of music from the middle age <u><em>that repeats its musical form with some changes.</em></u>
the main idea for this type of music is to have a romantic text with a <em>catchy chorus</em> that is in this case the part A of the song.
the part B is the verse and the part C is a bridge of the song
<em>so</em> <em>ABACA means the catchy chorus start the song then the verse come up then the chorus repeats and a bridge appears to finally end with the chorus.</em>